Method of treating vanadium-bearing ores.



I nace, or the like, in order to M Specification of Letters Patent.

Application filed July 28, 1914. Serial No. 853,725.

No Drawing.

To all whom it may concern.

Be it known that I, ROYAL citizen of the United States,

Miguel .icounty, have invented a certain new of Treating Qres, of which the following is a tion.

S. DAVIS, a residing at Colorado, and useful specifica- This invention relates to an improved method of treating vanadium bearing ores subsequent reduction, I subject the dies to a chloridizing roast in a reverberatory furchange the vanadium compound containing vanadium in the form of V 0 into a vanadate containin vanadium in the form of V 0 in which findition it is best suited for reduction by what is known as the alumino-ther- The preferred form of roast employ is a chloridizing roast in which a chlorid, such, for example, as sodium chlori is used, which on the application of cat breaks up into chlorin and sodium. passes off and the sodium is free to unite with the vanadium to form a vanadate. The roasted ore is then leached, and I have found that the residue still contains recoverable quantities of .vanadium in the form of V and it is the purpose of my invention to recover these values in a simple and economical manner.

A number of fumes are given ed in the reactions which in the chloridizing roasts just above described, such, for example, as hydrochloric acid, chlorin, bon dioxid, and sulfuric acid, and certain of these mes are solvents of vanadium. he reactions which produce the above mes are Vanadium Bearing Patented Apr. 24, 11917.

with moist air form:

QHCl-f-H SO the reaction being 2Cl-l-SO,+2H,O=2HCl+I-I SO,,.

invention, I prefer to In carrying out my from the roaster 1n cool the gases coming any suitable manner, as by the use of an ordinary regenerator, and then to pass the cool gases through water in a collecting device, such as a coke tower, allowing the water to absorb the fumes. This step is ordinarily termed scrubbing the gases and forms a weak solution of the solvent. I then apply this solution to the roasted ore either directly after roasting or after the vanadium ore has been leached. The solution dissolves the vanadium in the ore into a weak solution containing soluble vanadates, which can readily be precipitated in any well known manner, as by using ironsulfate. cool fumes directly to the moist ore, that is, without previously scrubbing the fumes, and thereafter washing out the soluble vanadates formed by the use of water.

It will be seen from employ the f roast which produce a soluble vanadate, and 'I have found that the extraction is increased substantially from 10 to 15 per cent. over the is very inexpensive.

claim 1. The herein described process of treating vanadium ores, which consists in sub? jecting the ores to a chloridizing roast, and then in applying in the presence of moisture the solvent fumes given off :to the roasted ore to produce a soluble vanadate.

The herein described process of treat ing vanadium ores, which consists in sub jecting the ores to a chloridizing roast, in cooling the fumes given off in such roast,

and then in applying the cooled fumes to It is also possible to apply the be apparent that my improved method the roasted ore in the resence of moisture to form a soluble vana ate.

' 3. The herein described process ing vanadium ores, jecting the ores to a chloridizing roast, in cooling the fumes given off in such roast, in scrubbing the fumes, and then in applying the resultant solution to the roasted ore to form a soluble vanadate.

4:. The herein described process of. treating vanadium ores, which consists in subjecting the ores to a chloridizing roast, in leaching the roasted ore, and then in applying to the resultant residue the fumes given off in the roast to form a soluble vanadate.

5. The herein described process of treating vanadium ores, which consists in subjecting the ores to a chloridizing roast, in 20 leaching the roasted ore, and then inapplying to the resultant residue a solution obtained by so bbing the fumes given off of treatwhich consists 1n sub in the roast with water to form a vanadate.

6. The

soluble herein described process of treating vanadium ores, WlllCh consists insubjecting the ores to a chloridizing roast, 1n leaching the roasted ore, in coo g the fumes formed during the roast, and then in applying the cooledfumes to the residue to form a soluble vanadate. 7 The herein described process of treating vanadium ores, which consists in subjecting the ores to a chloridi'zing roast, 1n

leaching the roasted ore, in cooling the fumes formed during the roast, in pass ing the fumes through water, and then in applying the resultant solution to the residue after leaching to form a soluble vanadate.

. ROYAL S. DAVIS. Witnesses H. R. Mosrmr, JAS. E. BIRCH. 

